A-Team_Digital_Solutions/android_kernel_motorola_sm6375
Watch
2
0
Fork
You've already forked android_kernel_motorola_sm6375
 0
mirror of https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git synced 2026-10-29 03:01:39 -04:00
Code Issues Projects Releases Packages Wiki Activity

mm: numa: pte_numa() and pmd_numa()

Browse source 
Implement pte_numa and pmd_numa.

We must atomically set the numa bit and clear the present bit to
define a pte_numa or pmd_numa.

Once a pte or pmd has been set as pte_numa or pmd_numa, the next time
a thread touches a virtual address in the corresponding virtual range,
a NUMA hinting page fault will trigger. The NUMA hinting page fault
will clear the NUMA bit and set the present bit again to resolve the
page fault.

The expectation is that a NUMA hinting page fault is used as part
of a placement policy that decides if a page should remain on the
current node or migrated to a different node.

Acked-by: Rik van Riel <[email protected]>
Signed-off-by: Andrea Arcangeli <[email protected]>
Signed-off-by: Mel Gorman <[email protected]>
This commit is contained in:
Andrea Arcangeli 2012-10-04 01:50:47 +02:00 • committed by Mel Gorman
commit be3a728427
3 changed files with 152 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

37
init/Kconfig
View file

@ -696,6 +696,43 @@ config LOG_BUF_SHIFT
config HAVE_UNSTABLE_SCHED_CLOCK
bool
#
# For architectures that want to enable the support for NUMA-affine scheduler
# balancing logic:
#
config ARCH_SUPPORTS_NUMA_BALANCING
bool
# For architectures that (ab)use NUMA to represent different memory regions
# all cpu-local but of different latencies, such as SuperH.
#
config ARCH_WANT_NUMA_VARIABLE_LOCALITY
bool
#
# For architectures that are willing to define _PAGE_NUMA as _PAGE_PROTNONE
config ARCH_WANTS_PROT_NUMA_PROT_NONE
bool
config ARCH_USES_NUMA_PROT_NONE
bool
default y
depends on ARCH_WANTS_PROT_NUMA_PROT_NONE
depends on NUMA_BALANCING
config NUMA_BALANCING
bool "Memory placement aware NUMA scheduler"
default y
depends on ARCH_SUPPORTS_NUMA_BALANCING
depends on !ARCH_WANT_NUMA_VARIABLE_LOCALITY
depends on SMP && NUMA && MIGRATION
help
This option adds support for automatic NUMA aware memory/task placement.
The mechanism is quite primitive and is based on migrating memory when
it is references to the node the task is running on.
This system will be inactive on UMA systems.
menuconfig CGROUPS
boolean "Control Group support"
depends on EVENTFD